Roller mill
AssigneeGebruder Buhler AG
InventorHeinz Resch
Life of this patent
Estimating the term…
Abstract
A roller mill, in which the milling rollers are pressed together with high pressures, has a fluidic device for imparting the respective pressure. This fluidic device comprises piston-cylinder units and a pressure line for the fluid. In order to obtain a skewing of at least one roller in dependency upon the pressure exerted by the fluidic device, pressure sensitive means are interposed between the pressure line and a displacing device for the skewing angle. In this way, a pressure signal may be transferred to a converter for converting the pressure into a corresponding displacement stroke. Preferably, at least one roller has a basic camber or crown which corresponds to a pressure within a lower range of the occurring pressures.
Claims26
A roller mill, comprising:
- at least first and second milling rollers;
- first bearing means defining a first axis of rotation for said first milling roller;
- second bearing means defining a second axis of rotation for said second milling roller;
- means for supporting opposite ends of at least one of said first and second bearing means for movement so that the axes of rotation of said milling rollers are movable into and out of parallel with each other;
- pressure imparting means to press said milling rollers together, said pressure imparting means comprising
- fluidic actuating means including piston-cylinder means,
- a source of pressurized fluid, and
- transfer means for said fluid from said source to said piston-cylinder means;
- and
- displacing means for automatically displacing the ends of at least one of said bearing means in opposite directions simultaneously to skew said first and second axes of rotation out of parallel, said displacing means comprising
- converter means for converting the pressure exerted by said pressure imparting means into a corresponding stroke of displacement;
- and
- connecting means interconnecting said pressure imparting means and said displacing means to make the amount of skew dependent upon the pressure exerted by said pressure imparting means, said connecting means including pressure transfer means connected to said pressure imparting means to transfer a signal corresponding to the pressure exerted, said pressure transfer means being also connected to said converter means.
A roller mill, comprising in combination:
- at least first and second milling rollers each having a peripheral surface of predetermined length;
- first bearing means defining a first axis of rotation for said first milling roller;
- second bearing means defining a second axis of rotation for said second milling roller;
- means for supporting opposite ends of at least one of said first and second bearing means for movement so that the axes of rotation cf said milling rollers are movable into and out of parallel with each other;
- fluidic pressure imparting means to press said milling rollers together;
- varying means for adjusting the pressure exerted by said pressure imparting means between a lower range of pressure including a minimum pressure, and a higher range of pressure;
- and
- displacing means for automatically displacing the ends of at least one of said bearing means in opposite directions simultaneously to skew said first and second axes of rotation out of parallel responsive to the pressure exerted on said rollers by said pressure imparting means;
- at least one of the peripheral surfaces of said rollers having a camber corresponding substantially to said lower range of pressure.
A roller mill, comprising:
- a plurality of milling rollers rotatable about generally parallel axes;
- means for fluidly biasing said rollers together under a predetermined fluidic pressure;
- means for supporting one of said rollers for transverse displacement between parallel and skewed positions relative to the other roller;
- a rotatable control shaft;
- a pair of skew eccentrics secured in laterally spaced-apart relationship to said control shaft, said eccentrics being oriented 180 degrees out of phase relative to each other;
- means including links coupled between said eccentrics and opposite ends of said one roller;
- and
- means responsive to the applied fluidic pressure between said rollers for automatically actuating said control shaft in order to displace opposite ends of said one roller in opposite directions simultaneously to adjust skew and maintain substantially uniform pressure distribution along said rollers.
Dependencies are inferred from the claim text.